I saw this happen once...
I was at work, and had a gorgeous albino pine snake out with me. A young child, he must have been less then 4 years old, wanted to see it. We sat down off to the side, and he just laughed with joy because he was able to pet the snake. Moments later, his mother walked by, and freaked out. The child then recoiled and hid behind his mother, giving me this look like I was a monster for letting him near something I shouldn't have. I was pretty mad...the kid was just enthralled before his mom got there. :/